code: def test_abstract_base_model(self):
      with self.assertRaises(TypeError):
          EnsembleModel()
  
file_path: botorch/test/models/test_ensemble.py
imports: import torch
  from botorch.models.ensemble import EnsembleModel
  from botorch.utils.testing import BotorchTestCase
label_desc: Use image node_id 1 for calling the TestEnsembleModels obj's underlying member method code with example usage: obj.test_abstract_base_model() without return types